EMC Directive

12.1 Requirements for Conformance to EMC Directive

The EMC Directive specifies the products must “be so constructed that they do not cause excessive electromagnetic interference (emissions) and are not unduly affected by electromagnetic interference (immunity)”.

The applicable products are requested to meet these requirements.

This section summarizes the precautions on conformance to the EMC Directive of the machinery assembled using PLC XGK series. The details of these precautions are based on the requirements and the applicable standards control. However, LSIS will not guarantee that the overall machinery manufactured according to the these details conforms to the below-described directives. The method of conformance to the EMC directive and the judgment on whether or not the machinery conforms to the EMC Directive must be determined finally by the manufacturer of the machinery.

12.1.1 EMC Standard

The standards applicable to the EMC Directive are listed below.

Table13-1

Specification Test item Test details Standard value

EN55011 Radiated noise

＊2

Electromagnetic emissions from the

product are measured 30~230 ㎒ QP : 50 ㏈㎶/m ＊1 230~1000 ㎒ QP : 57 ㏈㎶/m EN50081-2

EN55011

Conducted noise Electromagnetic emissions from the

product to the power line is measured 150~500 ㎑ QP : 79 ㏈ Mean: 66 ㏈ 500~230 ㎒ QP : 73 ㏈ Mean: 60 ㏈ EN61000-4-2

Electrostatic immunity

Immunity test in which static electricity

is applied to the case of the equipment 15 ㎸ Aerial discharge 8 ㎸ Contact discharge EN61000-4-4

Fast transient burst noise

Immunity test in which burst noise is applied to the power line and signal lines

Power line: 2 ㎸ Digital /O : 1 ㎸

Analog I/O, signal lines: 1 ㎸ EN61000-4-3

Radiated field AM modulation

Immunity test in which field is irradiated

to the product 10Vm,26~1000 ㎒

80%AM modulation@ 1 ㎑ EN61131-2

EN61000-4-12 Damped

oscillatory wave immunity

Immunity test in which a damped oscillatory wave is superimposed on the power line

Power line: 1 ㎸

Digital I/O (24V or higher): 1 ㎸

＊1) QP: Quasi-peak value, Mean: Average value

＊2) The PLC is an open type device (device installed to another device) and must be installed in a conductive control panel. The tests for the corresponding items were performed while the PLC was installed inside a control panel.

12-2

12.1.2 Control Panel

The PLC is an open type device (device installed to another device) and must be installed in a control panel. This is needed to prevent electric shock by touching XGK PLC and reduce the PLC-generated noise. Install the XGK PLC in a metallic panel to reduce PLC-generated EMI (Electro-magnetic interference),

The specifications for the control panel are as follows:

Control panel

The PLC control panel must have the following features:

(1) Use SPCC (Cold Rolled Mild Steel) for the control panel.

(2) The steel plate should be thicker than 1.6mm.

(3) Use isolating transformers to protect the power supply from external surge voltage.

(4) The control panel must have a structure which the radio waves does not leak out.

For example, make the door as a box-structure so that the panel body and the door are overlapped each other. This structure reduces the surge voltage generate by PLC.

(5) To ensure good electrical contact with the control panel or base plate, mask painting and weld so that good surface contact can be made between the panel and plate.

Panel body

Door

Seal

2) Connection of power and earth wires

Earthing and power supply wires for the PLC system must be connected as described below.

(1) Earth the control panel with a thick wire so that a low impedance connection to ground can be ensured even at high frequencies.

(2) The function of LG (Line Ground) and FG (Frame Ground) terminals is to pass the noise generated in the PLC system to the ground, so an impedance that is as low as possible must be ensured.

(3) The earthing wire itself can generate the noise, so wire as short and thick to prevent from acting as an antenna.

12.1.3 Cables

Extension cable connection

The extension cables contain a high frequency noise. Therefore, a ferrite core is attached to the extension cable as shown in the picture below to meet the CE conformance.

Model Manufacturer Remarks

CU1330D E-TECH ELECTRONICS -

ZCAT3035-1330 TDK -

2) Cable connection method for the inside control panel

In the case that the extension cable is connected to the metal panel, a space of at least 1cm is needed from the panel. The metal board of the control panel has a shielding effect that blocks noise, but it could be served as an

Ferrite core

12-4

12.2 Requirement to Conform to the Low-voltage Directive

The low-voltage directive requires each device that operates with the power supply ranging from 50V to 1000VAC and 75V to 1500VDC to satisfy the safety requirements. Cautions and installation and wiring of the PLC XGK series to conform to the low-voltage directive are described in this section.

The described contents in this manual are based on the requirements and the applicable standards control.

However, LSIS will not guarantee that the overall machinery manufactured according to the these details conforms to the above regulation. The method of conformance to the EMC directive and the judgment on whether or not the machinery conforms to the EMC Directive must be determined finally by the manufacturer of the machinery.

12.2.1 Standard Applied for XGK Series

The XGK series follow EN6100-1 (safety of devices used in measurement rooms, control rooms, or laboratories). And the XGK series modules which operate at the rated voltage of AC50V/DC75V or above are also developed to conform the above standard.

12.2.2 XGK Series PLC Selection

(1) Power module

There are dangerous voltages (voltages higher than 42.4 peak) inside the power supply modules of the AC110/220V rated I/O voltages. Therefore, the CE mark-compliant models are enhanced in insulation internally between the primary and secondary.

(2) I/O module

There are dangerous voltages (voltages higher than 42.4V peak) inside the I/O modules of the AC110/220V rated I/O voltages. Therefore, the CE mark-compliant models are enhanced in insulation internally between the primary and secondary.

The I/O modules of DC24V or less rating are out of the low-voltage directive application range.

(3)CPU module, Base unit

The above modules are using DC5V and 3.3V circuits inside, so they are out of the low-voltage directive application range.

(4) Special module, Communication module

The special module and communication modules are DC24V or less in rated voltage, therefore they are out of the low-voltage directive application range.

Chapter 13 Troubleshooting

Here describes the contents of various errors to be occurred while operating the system, the methods to find the causes and the actions.

13.1 Basic Procedure for Troubleshooting

It is important to use the high reliable machine to increase the system reliability but it is important to take a prompt action when the trouble occurs as well.

To start the system promptly, it is more important to find the trouble occurring cause promptly and take the necessary action. The basic items to comply when taking this trouble shooting are as follows.

1) Check by the naked eye

Check the following items by the naked eye.

• Machine operation state (STOP, RUN) • Power supply state

• I/O machine state

• Wiring state (I/O cable, extended and communication cable)

• After checking the indication state of each indicator (Power LED, Run LED, Stop LED, I/O LED etc.), connect the peripheral device and check PLC operation state and program contents.

2) Trouble Checking

Examine how the trouble is changed by the following action.

• Place the key switch on STOP position and apply the power ON/OFF.

3) Limit range

Estimate what is the trouble cause using the above method.

• Is it from PLC itself ? Or external cause ? • Is it from I/O module ? Or other cause?

• Is it from PLC program?

13.2 Troubleshooting

Here describes the method to find the trouble, the error code and the actions on the above by dividing them per phenomenon.

Trouble contents When Power LED is OFF

When ERR. LED is blinking

When RUN, STOP LED is

Action method when Power LED is OFF.

Action method when ERR LED is blinking